Ford Tri-Motors assembled at a hangar in United States.

View of partially assembled aircraft in a large hangar. Men attach landing gear to the aircraft. Men install engines. Workers lift pieces of wings in place. Close view of engine and propeller. Overhead view of men assembling aircraft in the construction area. A man climbs stepladder to climb on a wing. Men at table upholster seats. A man inside a plane bolts a seat to the floor. View of the inside of the aircraft from the rear. A man in the cockpit checks controls and then walks to the rear of the aircraft. A man inspects the engines and the tail assembly. A few gentlemen including William B Stout at the door of the plane. Some men climb aboard.